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Trying out the phone with your
hearing device is the best way to
evaluate it for your personaneeds.
M-Ratings: Phones rated M3
or M4 meet FCC requirements
and are likely to generate less
interference to hearing devices
than phones that are not labeled.
M4 is the better/higher of the two
ratings.
T-Ratings: Phones rated T3 or T4
meet FCC requirements and are
likely to generate less interference
to hearing devices than phones
that are not labeled. T4 is the
better/higher of the two ratings.
Hearing devices may also be rated.
Your hearing device manufacturer
or hearing health professionamay
help you find this rating. Higher
ratings mean that the hearing
device is relatively immune to
interference noise. The hearing aid
and wireless phone rating values
are then added together. A sum
of 5 is considered acceptable
for normause. A sum of 6 is
considered for best use.
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In the above example, if a hearing
aid meets the M2 leverating and
the wireless phone meets the
M3 leverating, the sum of the
two values equaM5. This should
provide the hearing aid user with
“normausage” while using their
For information about hearing aids and digitawireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/consumerfacts/hac_wireless.html
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